Help me, please!
I have two problems: 1. I have to give examples of series Xk and Yk which are conditionally convergent and Xk < ((-1)^(k+1))/k and (-1)^(k+1)Yk < 1/k. What could them be? 2. We know that Sn = ΣXk (k=1 -> n), An = Sn/n = 1/n*ΣXk (k=1 -> n) and limXn= b∈ℝ as n -> ∞. What can be said about limAn as n -> ∞?